<section class= "content-header">
    <h1>
        <b>{$header}
            <small>>>{$desc}</small>
        </b>
    </h1>
</section>
<section class="content">
    <div class="box" ></div>
</section>
<script>
  //防止后退
  // history.pushState(null, null, document.URL);
  //   window.addEventListener('popstate', function () {
  //       history.pushState(null, null, document.URL);
  //   });
</script>